Use of colonic luminal pressure to predict outcome after surgical treatment of strangulating large colon volvulus in horses.
Authors: Mathis Stephanie C, Slone Donnie E, Lynch Timothy M, Hughes Faith E, Clark Carol K
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Colonic Luminal Pressure as a Prognostic Tool in Large Colon Volvulus Colonic luminal pressure (CLP) measurement during surgery for strangulating large colon volvulus (LCV) has been proposed as a predictor of survival, yet its clinical reliability remains unclear. Mathis and colleagues conducted a retrospective analysis of 57 horses with LCV >270 degrees, comparing CLP measurements and outcomes in 27 horses undergoing manual correction versus 30 undergoing large colon resection and anastomosis (LCRA). CLP proved disappointing as a prognostic indicator: in the manual correction group, sensitivity was 0.60 and specificity 0.77, whilst in the LCRA group these values dropped to 0.50 and 0.54 respectively. The findings suggest that CLP measurements alone carry insufficient predictive power, particularly following resection procedures, and that surgical outcome depends on multiple interacting variables beyond luminal pressure. Practitioners should therefore exercise caution in using isolated CLP readings as the primary determinant of prognosis or decisions regarding surgical management, and instead integrate this measurement with clinical judgement, tissue viability assessment, and other intraoperative findings when counselling owners on expected outcomes.
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Practical Takeaways
- •Do not rely solely on colonic luminal pressure measurements to predict survival in large colon volvulus cases; use as part of a broader clinical assessment
- •CLP measurements may have slightly better predictive value for manual correction cases than for resection and anastomosis cases
- •Consider additional prognostic variables beyond CLP when counseling clients on expected outcomes after large colon volvulus surgery
Key Findings
- •Colonic luminal pressure (CLP) had sensitivity of 0.60 and specificity of 0.77 for predicting survival in horses undergoing manual correction of large colon volvulus
- •CLP measurements showed poor predictive accuracy (sensitivity 0.50, specificity 0.54) for horses undergoing large colon resection and anastomosis
- •CLP appears to be only one of multiple variables needed to predict outcome in strangulating large colon volvulus and should not be used in isolation